DataVXACS Applied Nano MaterialsPaper
journal article·2022-07-22Open access

Optimization of Chromium-Doped Zinc Gallate Nanocrystals for Strong Near-Infrared Emission by Annealing

Mátyás M. Rudolf, Gábor Bortel, Bence G. Márkus, Nikoletta Jegenyes, Vladimir Verkhovlyuk, Katalin Kamarás, Ferenc Simon, Adam Gali, David Beke

ACS Applied Nano Materials· Volume 5· Issue 7
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Source abstract

Abstract

Chromium-doped spinel crystals show long-lasting emissions in the near-infrared wavelength region. The emission can be activated by X-ray or ultraviolet–visible (UV–visible) light. Such properties make this material a promising candidate for background-free deep-tissue bioimaging, photodynamic or photon-induced therapy, and other applications. Here, we apply hydrothermal synthesis for the preparation of Cr-doped zinc gallate (ZnGa2O4) nanoparticles of small sizes with around 10 nm in diameter, which has the potential to be intravenously introduced to patients. We find that annealing of the as-prepared nanoparticles at 800 °C yields an order of magnitude increase in the emission intensity in the near-infrared wavelength region upon X-ray exposure with favorable long-lasting photoluminescence, which may be directly employed for deep-tissue cancer treatments when combined with IR700-mAb conjugate drug agents. We discuss the effect of annealing on the structural changes and the evolution of Cr defects of 10 nm Cr-doped zinc gallate nanoparticles by imaging techniques and monitoring their magneto-optical signals.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsMaterials processing

OpenAlex topics: Luminescence Properties of Advanced Materials · Nanoplatforms for cancer theranostics · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary

Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, PO. Box 49, H-1525 Budapest, Hungary

Stavropoulos Center for Complex Quantum Matter, Department of Physics, University of Notre Dame, Notre Dame, South Bend, Indiana 46556, United States

Department of Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary

Department of Atomic Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary

Funding

Magyar Tudom?nyos Akad?mia · European Regional Development Fund · Nemzeti Kutat?si Fejleszt?si ?s Innov?ci?s Hivatal

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